CVE-2018-1000100: GPAC MP4Box version 0.7.1 and earlier contains a Buffer Overflow vulnerability in src/isomedia/avc_ext.c lines

Q: How do I fix CVE-2018-1000100?

gpac: upgrade to newer than 0.7.1; ubuntu linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2018-1000100 being exploited?

CVE-2018-1000100 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2018-1000100 affect?

CVE-2018-1000100 affects gpac, ubuntu linux. Severity is high (CVSS 7.8). GPAC MP4Box version 0.7.1 and earlier contains a Buffer Overflow vulnerability in src/isomedia/avc_ext.c lines 2417 to 2420 that can result in Heap chunks being modified, this could lead to RCE. This attack appear to be exploitable via an a

Q: How urgent is CVE-2018-1000100?

Priority 49/100. High severity; On your watchlist

This month

HIGH 7.8WATCHLISTUPGRADEMITIGATE

CVE-2018-1000100 is a high-severity flaw (CVSS 7.8) affecting gpac, ubuntu linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

GPAC MP4Box version 0.7.1 and earlier contains a Buffer Overflow vulnerability in src/isomedia/avc_ext.c lines 2417 to 2420 that can result in Heap chunks being modified, this could lead to RCE. This attack appear to be exploitable via an attacker supplied MP4 file that when run by the victim may result in RCE.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-119
Published	2018-03-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: canonical · gpac project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-03-06 17:29 UTCPublished CVE record published
2026-06-17 01:32 UTCUpdated Record last modified

gpac project gpac UPGRADE

Affected: <= 0.7.1

Fixed in: newer than 0.7.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy gpac || rpm -q gpac || gpac --version

2. UPGRADE to newer than 0.7.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade gpac

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gpac

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

canonical ubuntu linux MITIGATE

Affected: 16.04 · 18.04 · 18.10

Fixed in: no fixed release known

Safe to downgrade to: a release before 16.04

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-1000100?

gpac: upgrade to newer than 0.7.1; ubuntu linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2018-1000100 being exploited?

CVE-2018-1000100 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-1000100 affect?

CVE-2018-1000100 affects gpac, ubuntu linux. Severity is high (CVSS 7.8). GPAC MP4Box version 0.7.1 and earlier contains a Buffer Overflow vulnerability in src/isomedia/avc_ext.c lines 2417 to 2420 that can result in Heap chunks being modified, this could lead to RCE. This attack appear to be exploitable via an a

How urgent is CVE-2018-1000100?

Priority 49/100. High severity; On your watchlist

Software pages

Ubuntu vulnerabilities

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References

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